But managers of the venue say they never had a contract with the party's organizers, who they say sold more than 500 tickets to their venue without their knowledge.

"We cannot cancel an event that was never booked. There was never an in-person meeting with organizers, never a hand shake and definitely not signed contracts or deposits," Clarendon Ballroom said in a statement issued Thursday evening.

Some calls and messages Clarendon Ballroom received were so threatening that they called police. Arlington County police are monitoring the situation, spokeswoman Ashley Savage said. The department is not aware of any credible threat.

The Arlington, Virginia, venue was contacted last week by a man who said he wanted to throw an inaugural party for an organization called Citizens for Trump, they say.

Managers say they sent the man a proposal and spoke with him by phone, but they did not sign a contract.

On Monday, they say they learned from a tweet more than 500 tickets had been sold for an event at their venue called the DeploraBall. Then, they say that on Tuesday evening a for-profit company requested a contract.

"Clarendon Ballroom made the business decision not to issue that contract due to the suspicious actions of the organizers," the company's statement said.

Organizer Jack Posobiec said Clarendon Ballroom cancelled the event when word got out of social media that it would occur there.

"The minute they did that regarding our event, they got a slew of comments and negativity regarding us, and after that, almost immediately after that, the Clarendon Ballroom called and cancelled our arrangement," he said.

“You know, to just be grossly generalistic, you could put half of Trump’s supporters into what I call the basket of deplorables. Right?” she said to applause. “The racist, sexist, homophobic, xenophobic, Islamophobic — you name it. And unfortunately there are people like that. And he has lifted them up.”

Located in a historic building with an Art Deco sign, Clarendon Ballroom opened in 2000 and regularly hosts weddings and dance parties.

Organizers announced on Sunday the event will be held at the National Press Club, which did not immediately respond to an inquiry.